| Year | 1941 |
| Date | 07-Aug |
| Volume | 85 |
| Issue | 2,100 |
| Page | 117 |
| Category | Improving the Two-Stroke |
| Part | |
| Title | "Getting Rid of the Hump" |
| Author | Edgar T.Westbury |
| Notes | Notes on "flat-top" or "deflectorless" two-stroke engines. An experimental 15-c.c. "flat-top" engine, sectional elevation and plan, induction systems, conclusions on "flat-top" engine design, there are others! |